Individual skill
roi-estimator
Estimate the ROI, payback, and NPV of an investment, project, or purchase. Use when asked to calculate ROI, build a business case, justify a purchase/initiative, work out payback period, or compare options by return. Produces a computed ROI summary (net benefit, ROI %, payback, simple NPV) with the assumptions made explicit and a sensitivity note, so a business case is defensible.
skills/roi-estimator/SKILL.md
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Nov 10, 2026
- License
- MIT
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# ROI Estimator Skill
Every "should we spend on this?" decision needs a defensible number. This skill estimates the return —
ROI %, payback period, and a simple NPV that accounts for the time value of money — from costs and
expected benefits, with the assumptions stated and a sensitivity check, so a business case survives the
first sceptical question instead of collapsing.
## Required Inputs
Ask for these only if they aren't already provided:
- **Costs** — upfront cost, and any ongoing/recurring cost (per period).
- **Benefits** — the expected gain per period (revenue uplift, cost saved, time saved × loaded rate). Quantify; if it's an estimate, say so.
- **Time horizon** — over how many periods to evaluate (e.g. 3 years).